Features 1Using optical lenses, the lens has multiple high throws and low throws, high transmittance 2Multi layer coating lens, effectively improve system brightness, restore real color 340mm large mirror, the greater the objective lens, the more of the enters the light, the light is sufficient, the imaging is brighter 4Living waterproof does not have to worry about accidental water, prevent moist weather in the air 5Suitable for harsh and poor environments outdoors, let you not be afraid in the journey Item Type: Single Tube Telescope Material: Aluminum Alloy Product Size: 31cm/12.2in Magnification: 3 to 9 Times Mirror Caliber: 40mm/1.6in Distance: 69.1 to 85.09mm/2.7 to 3.4in Pipe Diameter: 25.4mm/1in View: 13.41 to 40.38 at 100yds Guide: 20mm/0.8in Drawing Line: Differentiation Wire Coating Method: Blue Film Seismic or Not: Yes One Tube or Not: Yes The Perspective is Adjustable: Yes Waterproof Anti Fog: Yes Package List 1 x Single Tube Telescope with Cover 1 x Wipe Cloth 1 x English Manual 2 x Mount 1 x Hexa Tool